Improvement in mechanisms for molding paper-pulp



U ZSheetsf-Sheefl. 1. c.' a L. cusu'RN Mechanisms for Molding Pauper-Pulp.Y

N0,158,782- r Pmmedmn.19,1315.-

J. D." & LfUBURN Mechanismsfnr MoldingPape'r-Pulp.

No. 158,782. Patented 1an. 19, 1375.

UNITED STATES PATENT FFICE.

JEHIEL (l. COBURNz AND LEMUEL GOBURN, OF WORCESTER, MASS.; SAID J EHIEL C. COBURN ASSIGNOR TO SAID LEMUEL GOBURN.

IMPROVEMENT IN MECHANlSMSl-'OR MOLDlNG PAPER-PULP.

Specification forming part of Letters Patent No. l 58,782, dated'Janna-ry 19, 1875; application tiled December 10, 1873.

CASE C.

A To all whom it may concern Pulp and we do hereby declare that the followi'ng is a full, clear,.and exact description of the same, reference being had to the accompanying drawings which form a part of this specification, and in which- Figure 1 represents a front view of our improved pressing-machine. Fig. 2 repre sentsa side view of the same. Fig. 3 represents a horizontal section of the'matrix chambers or cylinders. Fig. 4 represents a central vertical section of one of the matrix-chambers, condensing-dies, and end of presser-plunger. Fig. 5 shows a detail side view of one of .the spring-latches to the discharging device.

The iirst part of our invention relates to the combination, with the platen and matrixchambers, of a peculiar discharging mechanism, working automatically by spring-latches, for

raising the bottom of the condensing-die to expel the pressed material from the chamber,

as `hereinafter described.

The second part of our invention relates to the combination, with the inner or central peri'orated cylinder, of a grooved core and conical caplpiece, as hereafter set forth.

To enable other skilled artisans to understand the construction and operation of our improved mechanism, we will proceed to de scribe it in detail. v

In the drawings, A denotes the bed of the machine supported on suitable legs A1. B B indicate the uprights or standards which support the top bar C, and parts connected therewith, and serve as guides for the platen D. E E indicate the matrix chambers or cylinders, into which the material is placed for compressing. Said cylinders E are mounted upon a sliding plate, F, that rests upon the bed A, and is tted to move back and forth between the guideways G G.

The cylinders E are made with a solid band of metal, anged at top and bottom and having the required internal diameterto correA spond with the size of the condensing-dies. The interior surface is channeled vertically with small grooves, between which are left ridges which support the perforated lining a, as indicated in Figs. 3 and 4. An annular groove, b, is formed around the interior lower part of the cylinder, from which passages c extend to the exterior of the lower ange, as indicated. rlhe moisture which is forced from the pulp when compressed, iiows into the vertical groove, and from thence to the exterior of the cylinders by way of the groove b and passage or passages c, which latter may be provided with suitably-arranged pipes or conductors for conveying the liquid away from the machine to any convenient locality, thus keeping the bed of the machine dry or comparatively free from moisture.

Any desired number of matrix chambers or Y cylinders may be used upon a single slide-plate,

F, to which'they are attached by bolts or screws through their lower flange. The npper ends of the cylinders are connected by a plate, H, bolted to their upper flanges, which -coivers the space, and prevents the pulp from falling between the cylinders.

The internal perforated cylinder I is supported on a core or standard, J, secured in and projecting up from the plate F. This core is grooved vertical] y,-. as indicated, to prevent thefpassage of moisture, while it supports the cylinder from collapsing with the force required for condensing the pulp, and permits of the central cylinder I being made of very thin metal. The grooves of the core communicate by suitable passages with the openings c, for the exit of the moisture. The core J is tted with a conical top or cap, j', which prevents any material from lodging on the upper end thereof, and also serves as a guide for the descendin g presser-plunger and die.` The lower parts of the condensing-dies K are arranged in the matrixchambers, while their upper parts are secured to the presser-plungers L, as shownl These compressing-dies K1 may be made with athin perforated lining, supported by flanges or ridges having water-passages between, and the edges of the die curved inward to impart the proper degree of roundness to the edge of the spool-heads to be formed therein, and an opening is formed through the center of the die through which passes the inner cylinder I. The presser-plungers L correspond in number to the chambers E. Their upper ends are secured to the platen D, while their lower ends pass through the guide-plate M, and carry the upper portions of the condensing-dies, which are screwed into their ends, as shown. The plungers L are made of sufficient length to reach the lower part of the chambers E, when the platen descends, and they are formed hollow to receive the inner cylinder at their center, and a venthole, e, is formed in their side for the escape of the inclosed air. The platenD is moved up and down by the press-screw N iu the present instance, but, if preferred, hydraulic or lever pressure may be used in lieu of the screw. D indicates the discharging devices, which consist of a plate having vertical rods P1, which extends up through the bed A and plate F, their ends resting flush with the top of the bed when the plate P2 is fully depressed, while, when the plate P2 is raised, the ends of the rods P1 strike the bottoms of the dies K and force them upward within the chambers E. The plate P2 is supported at its lowest position by two hangers, R, while at each end of said plate are arranged vertical elevating-rods P3 that extend up through the bed A, and are furnished at their upper endslwith slotted cross heads or plates P4, as indicated. These rods P3 are made adjustable in the plate P2, by nuts m n screwed onto their ends above and below the plate as shown.

Double spring-latches S are attached to the platen D, directly above the cross-heads P4, and extend downward through'opeuings in the guide-plate M, their construction and arrangement being such that when the platen D moves down to close the dies, and compress the material in the chambers E, the ends of the latches S will enter the slots of the crossheads P4, and by their elasticity be latched onto the edges thereof, so. that when the platen D rises the plate P2 will be drawn upward, and the die K, with the compressed material containedtherein, will be raised to the top of the chamber or cylinder E. When the parts have moved upward to the required position, the latches S are disengaged from the crossheads P* by the enlarged portion of the latch entering the small opening of the guide-plate M, (see Fig. 5,) and the parts being thus freed, the plate P2, rods P1 P3, and dies K, drop to their original position, leaving the uished spool-head at the mouth of the cylinder in a convenient position to be removed by hand, or otherwise. The slide plate and cylinders are moved to the front for charging and discharging, as indicated by dotted lines, Fig. 2, and the pulp may be poured into the cylinders from properly-arranged tanks and pipes.

The cylinders'may be arranged in two sets upon the slide-plate in such manner that one set will be beneath the. pressers while the other set is-in position for charging, and vice versa, all the cylinders in the set being oper- A ated upon simultaneously, and the charging performed alternately at the front and rear of the press.

By forming the matrix-chambers E with close solid rims grooved with passages, as shown, they are rendered very strong to sustain severe pressure, can be cheaply constructed, and also retain the expelled moisture in proper bounds and channels, and prevent its promiscuous ow over the machine.

The size and shape of the chambers and and dies may be varied to suit the size and shape of the articles to be formed therein.

Having described our improved mechanism for pressing pulp, what we claim therein as new and oi' our invention, and .desire to secure by Letters Patent, is-

l.` The combination, with the bed A, platen D, matrix-chambers E, and dies K, of the elevating-plate P2, rods P1 P3, guide-plate M, and spring-latches S, substantially as and for purpose set forth.

2. The combination, with the internal cylinder I, of the grooved core J, and conical point or cap f, as and for the purpose stated.

JEHIEL C. COBURN. LEMEL COBURN.

Witnesses:

CHAs. H. BURLEIGH, L. P. TRIsco'r'r. 

